I am using the new Google Play Game Services to develop my game on Android and I am now trying to include the invitation system. Have have 3 Google+ accounts that I use to t
If you are using a Wi-Fi hotspot (wireless router) for testing and there are other Wi-Fi hotspots in the vicinity, they can interfere with your Wi-Fi signal and block game invitations. Although there are 11 channels available on the 2.4 GHz band that most routers use, most wireless routers default to using the same channel (6). If you are in this situation, try changing the channel your router uses.
This problem kept me flummoxed for several weeks.